#include <iostream>
using namespace std;
int main(){
    int a=10;
    int b=20;
    int * const point=&a;
   *point=20;
    //point=&b;
    const int *point1=&a;
    point1=&b;
    //*point2=b;
    const int* const point2=&a;
   //point2=&b;
   //*point2=b;
    return 0;
}
